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Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
246,752 224,864 26% 41% 23% 11% 30,169 94% 3% 2% 1%
- Simulation Users 5
10,079 3,993 48% 26% 16% 10% 4,189 92% 4% 1% 3%
- Interactive Users 6
51,745 47,322 31% 40% 19% 10% 8,251 96% 3% 1% 0%
- Download Users 7
212,797 208,873 26% 40% 23% 11% 24,135 95% 3% 2% 0%
Total Users (old defn) 8
61,864 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 10,079 users
Simulation Runs 431,977 jobs
Total CPU Time 14,457 days  
Total Wall Time 32,916 days  
Total Interaction Time 7,079 days  
Users with > 10 mins of CPU Time 3,719 users  
Avg. Number of Simulation Runs/User 43 jobs  
Avg. Time between First and Last Simulation 410 days  
Repeat Users with > 10 Simulation Jobs 4,901 users  
Repeat Users with > 3 Months 9 2,705 users  
Table 3: Miscellaneous Statistics
Domains Served 16,320
Cummulative Interactive User Sessions 10 140,591
Cummulative Session Time 6,228 days
Visitors 11 516,220
Visits 12 1,550,116
New Accounts 10,753
Max User Logins 1000 users on 2014-02-19
Web Server Hits 74,678,538
Table 4: Collaboration Usage
Shared Tool Sessions 13 93
New tools under development 41
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
246,752 224,864 26% 41% 23% 11% 30,169 94% 3% 2% 1%
- Registered Users 2
23,332 6,051 47% 28% 16% 9% 6,337 89% 6% 1% 4%
- Unregistered Interactive Users 3
30,661 28,854 24% 45% 21% 10% 3,372 95% 3% 2% 0%
- Unregistered Download Users 4
192,759 189,959 25% 41% 23% 11% 20,460 96% 3% 2% 0%

  1. Sum of Registered Users2, Unregistered Interactive Users3 and Unregistered Download Users4
  2. Number of Users that logged in. User registration assigns a unique login to each individual user.
  3. Number of Unregistered Users, identified by unique hosts/IPs, that had an active Session 10 without logging in. Does not include known web bots/crawlers.
  4. Number of Unregistered users, identified by unique hosts/IPs, that had an active session of less than 15 minutes without logging in and downloaded a non-interactive resource such as PDF or podcast. Does not include web bots/crawlers.
  5. Number of Registered Users2 that ran one or more simulation runs.
  6. All Unregistered Users, identified by unique hosts/IPs, that had an active Session 10. Does not include known web bots/crawlers.
  7. All Unregistered users, identified by unique hosts/IPs that downloaded a non-interactive resource such as PDF or podcast. Does not include known web bots/crawlers.
  8. Sum of Simulation Users 5 + Unregistered Interactive Users 3 including web bots/crawlers.
  9. Number of Simulation users that returned after a gap of 3 months.
  10. Begins when an IP is active on the site for at least 15 minutes. Ends when inactive for more than 30 minutes, including time spent viewing videos.
  11. Identified by a unique IP address / hostname.
  12. Based on MIT OCW metric of Visits: A visit is activity by a unique visitor delimitated by a 30 minute absence from the site on either side of the activity.
    These visits correspond to unique visitors 11. Does not include known web bots/crawlers
  13. Number of Simulation sessions that were shared between 2 or more users.

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